Hoist



Patented Apr. 19, 1949 UNITED STATES PATENT OFFICE HGIST Harlow R. Olsen, Minneapolis, Minn.

Application February 3, 1947, Serial No. '726,048

. 6 Claims. l

This invention has relation to a hoist for material, such, for example, as brick or concrete blocks, adapted to be employed for the same general purpose as is the hoist disclosed in my Letters Patent of thev United States No. 2,364,547, for Combination hoist and scaifolding, granted December 5, 1944.

An object of the invention is to provide a. hoist incorporating features and characteristics of `invention adapted to render the hoist an improvement generally over the disclosure of my above identified 'United States Letters Patent.

A further object is to provide a new and im proved hoist wherein will be incorporated various desirable and improved features and characteristics of construction novel both as `individual entities of the hoist and in combination with each other.

A further object is to provide a hoist adapted to be moved substantially horizontally along scaffolding, 'having means .for receiving a load, mechv anism for causing said means, while supporting or not supporting said load, to be moved selectively upwardly or downwardly, in .substantially vertical direction, relative to said scaifolding, and a novel andimproved construction and arrangement including longitudinally adjustable uprights adapted to be rested against said scaffold# ing and to slidably receive said means.

And a further object is to provide vin la hoist adapted to be supported formovement to selected location along scaffolding and including a platform, or equivalent, for receiving material, a novel and improved construction and arrangement including longitudinally 'adjustable uprights along which said platform lis adapted to be moved, and devices for moving the lplatform along said uprights in direction substantiallyvertically of the scaffolding.

With the above objects i-n view, as well as others which will appear as the specification proceeds, the invention comprises the construction, arrangement and combination of parts as now to be fully Vdescriberl' and as hereinafter -to be specifically claimed, it hein-g `under-stand that the disclosure herein Iis merely illustrative and intended in no way in a limiting sense; Achanges in vdetails oi 'construction and .arrangement 'of parts lacing 'permissible afs 'long as lwithin the spirit of the "invention and thescope of the claims which follow.

in the accompanying 4drawings forming a part of this specification.

Fig. 1 is a front elevational view lof a hoist Amade according 'to the invention;

Fig. 2 is a side elevational view of said hoist as it would appear from the left side in Fig. 1, the view also disclosing scaifolding and .sug gesting the manner in which the hoist can be rested against scaifolding;

Fig. 3 is a rea-r elevational View, on a reduced scale, -of the hoist;

Fig. 4 is an enlarged horizontal sectional view, taken substantially on line 4--4 in Fig. 1; and

Fig. 5 is an enlarged vertical sectional View, taken substantially on line 55 in Fig. 1.

With respect to the drawings and the numerals of reference thereon, III denotes a masonry wall, II represents scaffolding, which may be of ore dinary or preferred construction, adjacent and parallel to saidma-sonry wall, and I2 indicates a hoist designed for use in connection with scafi folding such as II and including features and characteristics of the invention.

The scaffolding I lI consists of a usual frame I3, adapted to rest upon the ground or other surface, supporting a customary door lli of the scaffolding for workmen.

The hoist I'2 includes an elongated base I5 supported by spaced apart, lailined wheels It, I6 at opposite ends of Isaid elongated base. The wheels I6, I 6 are arranged tandem, each wheel is rotatably assembled, at II, with the elongated base, and said wheels I6 desirably may be at the midwidth of said elongated base l5.

The elongated base I5 rigidly supports, as vat "I8, I8, spaced apart uprights, designated I9 and 20,.respectively, ofsaid hoist I2. As disclosed, the upright I9 is supported directly above one of the wheels I6, and the upright 2D is situated interiorly of the other wheel l'6. The uprights I9, 20 are as shown perpendicular to the elongated base I5 and parallel with each other.

Each of the upright-s AI9 and .20 is constituted as a plurality of telescoping hollow tubular members. 'More explicitly, the upright `I9 consists .of a lower' hollow vtubular member 2i xedly connected to the elongated lbase I5, an intermediate hollow tubular member 122 ,and an upper hollow tubular member 2'3, and the upright 2li consists of a lower hollow tubular member '24 xedly connected to said velongated base 1'5, an intermediate hollow tubular member :.25 and an upper hollow ltubular member 26. It is to be understood, however, that each of :the uprights i9 and 20 can be comprised as two, or more than three, hollow tubular members.

A head frame or cross-beam 2l, parallel to said elongated base I5, rigidly connects the upper end portions .of the upper vhollow tubular mem- 3 bers 23 and 26 of said u-prights I9 and 2D to each other and retains said upper hollow tubular members 23 and 26 in spaced, fixed, parallel relation. Stated otherwise, the hoist I2 includes a collapsible rectilinear body constituted as the elongated base I5 supported for longitudinal movement upon the wheels |16, I6, the spaced apart, parallel uprights I9, 26 each consisting of telescoping hollow tubular members a lowermost one of which is rigid with said elongated base, and the head frame or cross-beam 2I perpendicular to said uprights and rigid with uppermost telescoping hollow tubular members of the different uprights, respectively. All of the elongated base I5, the uprights I9, and ythe head frame or cross-beam 2l lie in a single iplane.

The intermediate hollow tubular members 22 and 25 are snugly, vertically slidable in the lower hollow tubular members 2| and 24, respectively, and the upper hollow tubular members 23 and 26 are snugly, vertically slidable in said intermediate hollow tubular members 22 and 25, respectively.

Each of the hollow tubular members of each of 'the uprights I9 and 20 includes a longitudinally extending slot, each designated 28, and the con- -struction and arrangement are such that the longitudinally extending slots of the hollow .tubular members constituting each of said uprigh-ts I9 and 26 are in vertical alinement. That is to say, the longitudinally extending slots 28 in the hollow tubular members 2 I, 22 and 23 of the upright I9 are in vertical alinement, as are also the longitudinally extending slots 28 in the hollow tubular members 24, 25 and 26 of the upright 2D. Also, the construction and arrangement are such that the longitudinally extending slo-ts in the hollow tubular members constituting the uprights I9 and 20, respectively, face inwardly at the interior sides of said u-prights I9 and 20 and are in a plane passed longitudinally and centrally through .both uprights. Stated otherwise, the longitudinally extending slots in the hollow tubular members of the different -uprights I9 and 2l), respectively, face each other and lie in a plane passed vertically and diametrically through al1 of the hollow tubular members of both yof said uprights I 9 and 20.

The opposite side walls bounding or. defining each of the longitudinally extending slots 28 of each of the uprights I9 and 29 constitute a guide way 29 of the hoist which yfaces inwardly and extends longitudinally of Lthe corresponding upright. That is, the opposite side walls bounding or defining the longitudinally extending slots of the different uprights I9 and 2U, respectively, together provide oppositely disposed guide ways 29, 29 of the hoist which face each other.

A platform 30, for receiving material, such, for example, as brick or concrete blocks, situated between the uprights I9, 20 to extend to -position forwardly of said uprights, is mounted for slidable movement in direction longitudinally of the uprights. The platform 30 as disclosed is integral with a vertical support 3| for said platform, and oblique reinforcing elements 32 extend between and are integrally connected with said platform and vertical support. The vertical support 3| desirably is cut away at its interior 33.

Guide stri-ps 34, 34, including a guide strip slidably disposed in each of the guide ways 29, 29, are integral with and extend exteriorly from the opposite side edges of the vertical support 3| substantially in Athe plane of said Vertical support. The guide strips 34., 34 are substantially perpendicular to the platform 30, and are of sufcient length to effectively retain said platform in substantially perpendicular relation to the uprigh-ts I9, 20. Desirably, said guide strips 34, 34 will be of thickness slightly less than a dimension representing the width of each longitudinally extending slot 28, and all of the longitudinally extending slots 28 may be substantially of equal width. As disclosed more clearly in Figs. 4 and 5, the upper marginal portions ofthe guide strips 34, 34, as Well as the upper marginal lportion of the vertical support 3|, are offset, as represented at 35, in direction away from the Iplatform 30.

A cable 36, secured, as at 3l, to an upper, centrai portion of the vertical support 3|, extends upwardly over a sheave 38 rigidly supported, as at 39, upon the head frame or cross-beam 27 at location substantially midway between the `uprights I9, 20, and then downwardly over a sheave 40 rigidly supported, as at 4|, at the exterior side of the upright 20 upon an extension of said head frame or cross-beam 21. The end portion of the cable 36 opposite the vertical support 3| is wound upon and about a winch 42 rigidly supported, as at 43, upon a portion of the elongated base I5 at the exterior side of said upright 20.

An electric motor 44, for operating the winch 42, is mounted, as at 45, upon said elongated base I5 at the Side of said winch opposite the upright 20. A casing 46, between the electric motor 44 and the winch 42, houses gear reducing mechanism (not shown). An electric motor driven shaft 41 is adapted to drive gear reducing mechanism in the casing 46, and a horizontal shaft 48 is for drivingly connecting said gear reducing mechanism with the winch 42. Obviously, the platform 30 will be caused to move longitudinally of the hoist in response to actuation of the electric motor 44. The construction and arrangement can be such that said electric motor and winch will cause the platform to remain in any position to which moved by the electric motor. The motor employed can be of ordinary construction adapted to rotate in a single direction. In such an instance, the platform 30 would be elevated in response to operation of the motor and allowed to become depressed by gravity when released by the motor and winch. Or, the motor employed could be of type adapted to be rotated in either of opposite directions.

The hollow tubular members are adapted to be fixed at any adjusted position relative to each other which may be selected, thus to make possible longitudinal adjustment of the uprights I9 and 2|J, respectively. Stated differently, the uprights I9 and 20 can be made longer or shorter, as may be desirable in particular instances.

As disclosed, each of the intermediate hollow tubular members 22 and 25 of the different uprights I9 and 2U, respectively, includes spaced apart, vertically alined, rectilinear slots 49. The rectilinear slots 49 in the hollow tubular members 22 and 25, respectively, will be similarly spaced so that no matter what may be the position of vertical adjustment of said hollow tubular members 22 and 25 there will be horizontally alined rectilinear slots.

The upper portion of each of the lower hollow tubular members 2| and 24 hingedly supports, as at 50, a locking element 5| adapted to be swung in a horizontal plane and including spaced apart, vertically alined, inwardly extending locking lugs 52, 52. In the disclosure as made, the locking lugs 52, 52 are spaced at the same distance apart as are the rectilinear slots 49, and

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the free marginalv portions of: said locking lugs'y foreach of the locking elementsl. is constituted as an arml 53 rigid with the correspondingk hollow. tubular member, 2| or: 24, as the case may` be. having an aperture 54y for receiving a bolt 55 adapted to be removably inserted in said aperture at the rear of vertically spaced ears* 63 upon the corresponding locking element 5| and above andv below said keeper 53, thus to preclude thev possibility of the locking lugs 52, 52 becoming accidentally displaced from the rectilinear slots 49..` Also, each of the upper hollow tubular mem.-v bers 23 and 26 of the different uprights |;9 andl 20, respectively, includes spaced apart, rectilinear slots 49, equivalent to the rectilinear slots already described and for the same purpose, and the upper portion of each of the intermediate hollow tubular members 22 and 25 hingedly support a locking element 5|, equivalent to the locking elements already described and for the same purpose.

Locking lugs 52 upon the locking elements 5| carried by the intermediate hollow members. 22 and 25 are adapted to be inserted in and removed from the rectilinear slots'49 in the upper hollow tubular members in substantially the manner as set forth in connection with the locking lugs upon the locking elements carried by the lower hollow tubular members 2| and 24, and keepers 53 are provided for said locking elements upon said intermediate hollow tubular members.

In the illustrated embodiment of the invention, the rectilinear slots 49 in the upper hollow tubular members 23 and 26 are spaced apart the same distance as are the rectilinear slots 49 in the intermediate hollow tubular members 22 and 25, and the construction and arrangement are such that the lugs 52, 52 upon the locking elements 5`| carried by the lower hollow tubular members 2| and 24 can be inserted in rectilinear slots in the upper hollow tubular members while also in rectilinear slots in the intermediate hollow tubular members, thus to be capable of retaining all of the hollow tubular members of the uprights I9 and 20 in xed relation to each other.

The upper end portion of each of the lower hollow tubular members 2| and 24 includes means, denoted 56, for precluding removal of the intermediate hollow tubular members 22 and 25 from said lower hollow tubular members, and the upper end portion of each of said intermediate hollow tubular members includes means, also denoted 55, for precluding removal of the upper hollow tubular members 23 and 2B from the intermediate hollow tubular members.

Cross-bracing betwen and permanently assem bled with the lower hollow tubular members 2| and 24 is represented at 5l, cross-bracing between and removably assembled with the intermediate hollow tubular members 22 and 25 is indicated at 58, and cross-bracing adapted to be situated between and removably assembled with bers by headed and nul-tedv screw bolts 60.

the upper hollow tubular members 23 and 26 is designated 59'. As shown,'the cross-bracings 582 and 59 are adapted to be removably secured between their corresponding hollow tubular mem- Of course, either one of the crossbracings 58 or 59 could be so employed that its upper portion was secured between the upper hollow tubular mem bers 23 and 2li while its lower portion was secured between the intermediate hollow tubular members 22 and 25, as, for instance, when said upper hollow tubular members 23 and 25 were but partially extended from said intermediate hollow tubular members 22 and 25.

Threaded rods tl extending outwardly from the permanent cross-bracing 5l, adapted to rev movably receive nuts 62, can be employed tov retain. the removable cross-braeingsA 58 andr 59 upon the hoist when said cross-bracings 58`v and 55 are out of use. See Figs. 2, 3 and 5.

It wi-llbe evident that thehoist l2 can be readily and easily moved along the full length of the scaiiolding |f. In practical use, the hoist can be manipulated along the scaffolding by a workman standing on the-scaffolding floor |f'4. rEhe hoistl will be disposed in oblique relation to the scaffolding so that the uprights rest against the forward edge oi the scaiolding floor. A workman situated upon the scaiolding can grasp the hoist and cause it to. be rolled along on the wheels l5,

nally, thus to suit various different working con! d'tions. For a relatively low scaffolding, the arrangement may be about as in Fig. 2 of they drawings, for a comparatively higher scaffolding'. the intermediate hollow tubular members 22 and 25 may be extended to greater or less extent from the lower tubular members 2| and 24, and for a still higher slcaiolding the upper hollow tubular` members 23 and 26 also may be extended to greater or less extent from said intermediate hollow tubular members 22 and 25.

Obviously, the platform 3U can be readily and easily raised and lowered no matter what may be the length of the uprights I9 and 20 and no matter at what position the hoist may be situated along a length of scaffolding.

The hoist, while adapted to be supported against scaffolding which varies in height, for movement to selected location along,r the scaffolding, is, at the same time, equipped with a platform for receiving material and with mechanism for raising and lowering the platform.

What is claimed is:

l. A hoist comprising a base, spaced apart uprights upon said base each constituted as a plurality of telescoping hollow tubular members adapted to be adjusted longitudinally relative to each other, said telescoping hollow tubular members of each of said uprights, respectively, including longitudinally extending vertically alined slots and the longitudinally extending, vertically alined slots of the telescoping hollow tubular members of the different uprights providing guide ways in facing relation to each other at the interior sides of said different uprights, means for fastening the telescoping hollow tubular members constituting each of said uprights in fixed relation to each other at any one of several dif-- ferent positions of longitudinal adjustment of said telescoping hollow tubular members, guide members mounted for slidable movement along said guide ways, a platform rigid with said guide members, and mechanism for causing said guide members and platform to be moved along said guide ways.

2. The combination as specied in claim 1, and a cross-beam spaced from said base and rigid with a telescoping hollow tubular member of each of said uprights.

3. A hoist comprising a base, spaced apart uprights upon said base each constituted as a plurality of telescoping members adapted to be adjusted longitudinally relative to each other, the telescoping members of each of said uprights including longitudinally extending, alined slots, means for fastening the telescoping members constituting each of said uprights in xed relation to each other at any one of several different positions of longitudinal adjustment of said telescoping members, means mounted for slidable movement along said longitudinal slots, a platform rigid with said means, and mechanism for causing said means to be moved along said telescoping members.

4. A hoist comprising a base, spaced apart uprights upon said base each constituted as a plurality of telescoping members adapted to be adjusted longitudinally relative to each other, the telescoping members of each of said uprights including longitudinally extending, alined slots, means for fastening the telescoping members constituting each of said uprights in xed relation to each other at any one of several different positions of longitudinal adjustment of said telescoping members, a cross beam spaced from said base and rigid with a telescoping member of each of said uprights, means mounted for slidable movement along said longitudinal slots, a platform rigid with said means, and mechanism for causing said means to be moved along said telescoping members.

I 5. A hoist comprising a base, spaced apart uprights upon said base each constituted as a. plurality of telescoping hollow tubular members adapted to be adjusted longitudinally relative to each other, said telescoping hollow tubular members of each of said uprights including longitudinally extending, alined slots and the longitudinally extending, alined slots of the telescoping hollow tubular members of the different uprights providing guide ways at opposite sides of said hoist, means for fastening the telescoping hollow tubular members constituting each of said uprights in xed relation to each other at any one of several different positions of longitudinal adjustment of said telescoping hollow tubular members, guide members mounted for slidable movement along said guide ways, a platform rigid with said guide members, and mechanism for causing said guide members and platform to be moved along said guide Ways.

6. The combination as specified in claim 5, and a cross beam spaced from said base and rigid with a telescoping hollow tubular member of each of said uprights.

HARLOW R. OLSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 936,911 Klaus et al. Oct. 12, 1909 937,256 Minnich Oct. 19, 1909 1,458,195 Pavey June 12, 1923 1,887,548 Dartsup Nov. l5, 1932 2,364,547 Olsen Dec. 5, 1944 

